X-Small
◦Chest: 10"-13" (Most Important)
◦Neck: 7"-10"
◦Pets Weighing: 3lbs.-5lbs.
Small
◦Chest: 13"-16" (Most Important)
◦Neck: 10"-13"
◦Pets Weighing: 6lbs.-10lbs.
Medium
◦Chest: 16"-19" (Most Important)
◦Neck: 13"-16"
◦Pets Weighing: 11lbs.-15lbs.
Large
◦Chest: 19"-21" (Most Important)
◦Neck: 16"-19"
◦Pets Weighing: 16lbs.-32lbs.
X-Large
◦Chest: 21"-26" (Most Important)
◦Neck: 19"-23"
◦Pets Weighing: 33lbs.-45lbs.
XX-Large
◦Chest: 26"-31" (Most Important)
◦Neck: 23"-26"
◦Pets Weighing: 46lbs.-70lbs.